<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>

</body>
<script>
    var monkey={
        feeds: 'bananas',
        breathes: 'air'
    };
    function Human(){}
    Human.prototype=monkey;
    var developer=new Human();
    if(developer.__proto__===monkey){
        alert(1);
    }else{
        alert(2);
    }
    console.log(developer);
</script>
</html>